<template>
	<div class="shopcar-container">

		<!-- 商品列表区域 -->
		<div class="goods-list">
			<div class="mui-card" v-for='(item, i) in goodslist' :key='item.id'>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
						<mt-switch v-model='$store.getters.getGoodsSelected[item.id]' @change='selectedChanged(item.id, $store.getters.getGoodsSelected[item.id])'></mt-switch>
						<img :src="item.thumb_path">
						<div class="info">
							<h1>{{ item.title }}</h1>
							<p>
								<span class="price">￥{{ item.sell_price }}</span>
								<numbox :initcount='$store.getters.getGoodsCount[item.id]' :goodsid='item.id'></numbox>
								<!-- 问题：如何从购物车中获取每件商品对应的数量呢 -->
								<!-- 我们可以先创建一个空对象，然后循环购物车中所有商品的数据，把当前循环这条商品的Id 作为对象的属性名，count值作为对应的属性值，这样把所有的商品循环一遍后就会得到一个这种对象了:{ 88: 2, 89: 1, 90: 5} -->
								<a href="#" @click.prevent='remove(item.id, i)'>删除</a>
							</p>
						</div>
					</div>
				</div>
			</div>
		</div>


		<!-- 商品结算区域 -->
		<div class="mui-card">
				<div class="mui-card-content">
					<div class="mui-card-content-inner jiesuan">
						<div class="left">
							<p>总计(不含运费)</p>
							<p>已勾选商品 <span class="red">{{ $store.getters.getGoodsCountAndAmount.count }}</span>件, 总价 <span class="red">￥{{ $store.getters.getGoodsCountAndAmount.amount }}</span></p>
						</div>
						<mt-button type='danger'>去结算</mt-button>
					</div>
				</div>
			</div>

			<p>{{$store.getters.getGoodsSelected}}</p>
	</div>
</template>

<script >
	// 导入购物车里面数量选择框子组件
	import numbox from '../subcomponents/shopcar_numbox.vue'

	export default {
		data() {
			return {
				goodslist: [] // 购物车中所有商品的数据
			}
		},
		created() {
			this.getGoodsList();
		},
		methods: {
			getGoodsList() {
				// 获取到 store 中所有的商品Id 然后拼接处一个用逗号分隔的字符串
				var idArr = [];
				this.$store.state.car.forEach(item => idArr.push(item.id))

				// 如果购物车中没有商品，则直接返回，不需要请求数据接口，否则会报错
				if(idArr.length <= 0) {
					return;
				}

				// 获取购物车中所有商品列表信息
				this.$http.get('api/goods/getshopcarlist/' + idArr.join(',')).then(result => {
					if(result.body.status === 0) {
						this.goodslist = result.body.message;
					}
				})
			},
			remove(id, index) {
				// 点击删除，根据传递的Id把商品从 store的car 中删除，同时，把当前组件中的 goodslist 对应这条商品根据传递索引值进行删除
				this.goodslist.splice(index, 1);
				this.$store.commit('removeFormCar', id)
			},
			selectedChanged(id, val) {
				// 每当单击开关，把最新的开关状态同步到 store的car中
				// console.log(id + '---' + val)
				this.$store.commit('updateGoodsSelected', {id, selected: val});
			}
		},
		components: {
			numbox // 挂载购物车里面数量选择框子组件
		}
	}
</script>

<style lang="scss" scoped>
	.shopcar-container {
		background-color: #eee;
		overflow: hidden;
		.goods-list {
			.mui-card-content-inner {
				display: flex;
				align-items: center;
			}

			img {
				width: 60px;
				height: 60px;
			}

			h1 {
				font-size: 13px;
			}
			.info {
				display: flex;
				flex-direction: column;
				justify-content: space-between;
				.price{
					color: red;
					font-weight: bold;
				}
			}
		}


		.jiesuan {
			display: flex;
			justify-content: space-between;
			align-items: center;
			.red {
				color: red;
				font-size: 16px;
				font-weight: bold;
			}
		}
	}
</style>